Automatic temperature-regulator.



H. HOHLMANN, JR. AUTOMATIC TEMPERATURE REGULATOR.

APPLICATION FILED FEB.6, 1911y Patented Aug. 20, 1912.

HEINRICH HQHLMANN, sm., or ESSEN-oN-THE-RUHR, GERMANY, AssrGNon 'ro MAX vnoallasentiti), 4on DORTMUND, GERMANY.

`.IVLMAWIC TEMPERATURE-REGULATOR.

T 0 all 'whom it may concern:

. Be it known that I, HEINnIcH HoHLivIANN, Jr., of 64 Stoppenber erstrasse, Essen-on the-Ruhr, in the King" o'mot Prussia, Empire of Germany, xznerchant, have invented certain new and iiseful Improvements in Automatic Temperature-Regulators; and I- do hereby declare vthe following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In many ofthe industrialarts it is an absolute necessity that the contents of receptacles employed therein be kept at the same or practically thesame temperature. This is for inst-ance the case in breweries with mashing-tubs, brewers .':oppers and the like, or 1n larger butcherlcs, where hams,

sausages, etc.,- are to be well boiled, but must be prevented fromboiling `to pieces. In order to answer these conditions devices must be provided which shall act automatically whcn the desired temperature is over-l stepped or not reached, lso that the temperature of the contents of the receptacles employed can be ,regulated within very narrow limits. Y

The object of my presentinvention is to provide an automatic temperature-regulator for receptacles, the Contents of which are to be kept at-an even temperature, which shall fulfil these conditions 1n a very simple and yet effective manner.`

To this end I employ an electro-magnetically operated valve-lever which is' steadily borne downward and simultaneously serves as a support of thespindle of a self-closing liquid-valve and as apcarrier of an overflowreservoir I'in such a manner, thatas soon as the highest temperature permissible haslbeen reached said valve-lever will rise and open said valve, whereas said lever .will be drawn down under the influence of the filled'over- How-reservoir as Soon as the lowest ,tempera-` ture permissible has been attainpd; whereupon said valve will, he automatically'closed. This play will-continue with periodical .intern v tions until the regulator will `be switc ed out and the contents of the recap-- tacle are removed.

This temperature-regulator ,differs from the known regulators of this kind inasmuch as it cangbe applied not only to a great va 5 riety'of purposes, but also ctlers the advan- Speoication of Letters Patent.

'Application led February 6, 1911.

Patented Aug. eo, 1912. Serial No. 606,718.

1 is an elevation of my present invention,

partly in section. F ig. 2 is a plan-view of one of the electro-magnets employed for locking and releasing a valve-lever.

Upon the base 1 the valve --casing 2qis mounted and connected by means of the branch 3 to the supply-pipe 4 by which ,the cooling-water is led to said casing. Within the latter the' valve 5 is arranged and seated upon the spindle 6 which is steadily ressed downward bythe spring 7 centered by the screw-cap 8 and guided in the stuffing-box 9. From the latter the lower end of said spindle projects downward to contact with the valvellever 10 which is hinged to a lateral arm 11. of the valve-casing. Cppositetov this arm an angularly bent discharge-conduit 12 is arranged and passes through the opening 13 into the cylindrical splasher 14, the lower end of which is connected by means of a drain-hose 15 or the like to a receptacle A thecontents of which are to be kept at .the Same or practically thesame temperature. Within said splasher a reservoir or `bucket 16 yis arranged and held in suspension by the bifurcated hanger-17 attached by means of the rod 18 to said reservoir and by means of its-hooked end to the eye 19 of the lever 10. Above the latter a bracket 20 is secured to the base 1 and holds in its horizontal flange an eye-bolt 21. With this bolt the lever 10 .is connected by means of a tension-Spring 22, the tension of which can he regulated by moving the eyebolt upward or downward ,by the aid of the knurlednut 23. Above lsaid splaeher and,-

sidewise ofthe end 4of the lever 10 the electro-magnets 24 and 25 are arranged in such a manner that said lever willbe retained by the former when the valve 5 is opened, and

by the latter when' said valve is closed. l To this end the T-shaped .armature 26 of the electro-magnet 24 is provided with awedge-l shaped nose or catch 27a whose retainingface points upward; whereas the similarly.

shapednose 28 ,of the armature 29 .of the electro-magnet 25 points downward, Fora similar reason the sliding surfaces othese noses are slanting' in opposite directions.

when released by the core, by which it is` carried. The armatures may be guided and Each of these armatures is pushed outward by Vmeans of a spring 30 abutting against the horse-shoe core 31 of its 'electro-magnet retained in' their outward position as clearly illustrated in Fig. 2, wherein the spring 30 is arranged between the `end of the tubular shank 32 of the armature and the bow of thehorse-shoe core and is guided .on the shaft ofl the stud 33. The latter carries the f armature on its head 34 ard retains it in its proper-position by a cross-pin 35 operating in the guide-slots 36 of the tubular shank 32;

Within receptacle A is arranged a thermostat B which'is shown to consist of acompound metal rod 41 adapted to be dellected to the lett or to the right when the temperature of the contents ofI the receptacle rises or falls. Rod 41 is secured at one end to the wall of receptacle A as at 42, while the other end of said rod is flanked by a pair of; spaced contacts 43, 44 respectively., 'Contact 41 is by wire 45'conn'ected to one ot the coils 40 of electromagnet 24 which is in turn by wire 46 connected to a source of electricity 47, vthe latter being by wire 48 connected to the fixed end of rod 41. Contact 44 is by. wire 49 connected to the coils 40 (if electromagnet 25 which is in turnby wire -50 connected to wire 46. When the parts occupy the positions shown in Fig. 1, the lever 10 is retained by the armature 26 ot' electro-magnet 24, therebyy maintaining valve 5 in its opened position to admit cooling water into receptacle 16. When the lowest temperature permissible has been reached within receptacle A, thermostatic ployed for similar purposes, the lever 10 is now free to descend under the influence of the weight `of the volume of water contained in saidA reservoir because the spring 22 is too weak to resist the action of said Avolume of water. The result o-f'this motion of said lever is, that the valve 5 is closed, the armajture 29 is pushed inward'against its spring 30 andy that the nose 28 will slip over the end of the lever 10 and retain it in its new position, wherein it is most eliectively aided byithe spurv 38 of the arm 1].. Since the valve 5 is'closed now, none'f the liquid,

usually' water, .contained vin the `reservoir will vhereafter flow 0E through the over- `by way of the flow-,holes 39, but all will leave the reservoir,

outlet-opening 37. The contents of the receptacles, such as mashingtubs, brewers 2coppers,.vats, boilers andthe like, havenowreached their lowest temperature and some time will elapse before they will reach again their highest temperature. At the moment this takes place, rod'41 Will be deflected to impinge against contact 44 to send an 'electric current through the coils '40 of the electro-magnet 25, so Vas to attract its armat-ure 27l and release lever 10. Since the reservoir 16 is empty now, the spring 22 is in a position to raise the lever 10 and said reservoir tar enough` upward to push the armature 26 of the electro-magnet 24 ine. ward to let the nose 27 slip .under the tree end of the lever 10. Simultaneously herewith the valve 5 is being opened again, so that cold water can flow anew into the reservoir 16, which it leaves partly by way of the outlet-opening 37 and partly by way of the overflow-holes 39 to pass through the hose 15 or the like to the receptacle the 'contents of which have to be kept at an even temperature. ,Through the mixture of the cooling-water with said contents the temperature of the latter will of course sink again, so that after a certain interval of time the valve4 5 will be closed again inthe manner indicated above. This periodical opening and closing of the valve will cause the temperature ofthe contents of the receptacle to vary within very narrow limits,l so that the meanl temperature will represent the normal temperature desired.

I claim 1 'In an automatic temperature regulator of the class described, a self-closing liquid supply valve, a spindle carrying'the same, a lever engaged by said spindle and adapted to open the valv e, a self-emptying bucketV suspended from the lever and adapted to receive a temperature regulating liquid, `a spring for raising the lever and bucket, the

combined weight of the lever and ycharged bucket exceeding the pull ofthe spring, while said pull exceeds the weight of the lever and emptied bucket, independent means for locking the lever in either of its end positions and thermostat-ic means adapted ,to actuate the independent locking means.

2. In'an automatic temperature regulator yof the classdescribed, la self-Closing liquid f i i @upper overflow openings, the area of the of its end positions, a pair of electromagnets for releasing said catches and thermostatic means adapted to actuate the electromagnets.

3. In an automatic temperature uregulator of theclass described, a valve casing having a seat, a liquid supplypipe and a liquid discharge conduit communicating 'with said casing, a valve adapted to engage' the seat, a

' spring-inuenced spindle carrying the valve 'and projecting downward through the casing, a lever hinged to the' casing and en-v gaged b the valve-spindle, a bucket suspended rom the lever below the discharge conduit,- said bucket being providediwith a lower liquid outlet port and a plurality of port being less than that of the discharge conduit, a 'splasyhcri surrounding thev bucket,

a liquid receptacle the temperature of which i is to be regulated, means for connecting the splasher `Withsaid receptacle, a lifting spring engaging lever,` means, for locking the lever in either of its end positions and thermostat-ic means adapted to actuate the locking means.

4. In an automatic temperature regulator I of the class described, a supply pipe, a discharge conduit, a valve intermediate said pipe' and conduit, a lever operativelys connected to 'said' valve, a bucket suspended from the lever below the discharge conduit. said bucket being provided with a lowery liquid outlet port anda plurality of up er overflow openings, the area of the port being less than that of. the' discharge conduit, a splasher surrounding the bucket, a liquid rev ceptacle the temperature of which is to be regulated, means for'connecting the splasher with said receptacle, a lifting spring engaging the lever2 means for locking `the lever in either offits end positions and thermostatic means 'adapted to actuate the locking means.

i5. In an automatic temperature regulator of the class described, a valve casing, a

liquid 'supply valve inclosed therein, andy having-a spindle, that'projects downward through, said casing, a lever engaged by the valve-spindle, an apertured bucket suspended from the lever, independent adjustable means for raising the lever, means for locking the lever in either of its end positions, v

means for releasing said locking means, a receptacle the temperature of which is to be regulated and thermostatic means within said receptacle for actuating said releasing means.

6. In an automatic temperature regulator l of the class described, a Valve casing, a

liquid supply valve ilnclosed therein and hav ing a spindle that projects downward through said casing, a lever fulciiimed to the casing and engaged by the valve spindle, means for'raising the lever to open the valve, an apertured bucket .suspended from the lever, means for rclosing the valve upon a -descent 'of the lever, a pair-otelectromag-` 'the lever, a threaded boltconnected to the spring, ya bracket in which said bolt is guided, ay nut on the bolt that rests-on said bracket` and thermostatic means adapted to actuate thelever-locking means. l s

Signed by me at Barmen, Germany this 17th day of' January 1911. j

HEINRICH noiitnirii, .in '[r.. 8.]

Witnesses:

CHAs; J. WRIGHT, WALTER VoNNEGUT. 

